Straight, but oh no!
 

15/3.8/INFINITYYYYYYY over 26 hands.

PokerStars No-Limit Hold'em, $0.25 BB (5 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero ($34.50)
Button :#A500AF(Villain)/ ($43.45)
SB ($18.40)
BB ($18.80)
UTG ($56.45)

Preflop: Hero is MP with 5[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $1</font>, Button :#A500AF(Villain)/ calls $1, <font color="#666666">2 folds</font>.

Flop: ($2.35) 6[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $1.75</font>, <font color="#CC3333">Villain raises to $4.5</font>, Hero calls $2.75.

Turn: ($11.35) A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, Villain checks.

River: ($11.35) 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $5</font>, <font color="#CC3333">Villain raises to $15</font>

A-buh?!

Now what the heck? Where did I screw up and do I call?

Re: Straight, but oh no!
 

Folding would be uber-tight IMO.

You're up against a set here, or even a crappy two-pair, way more often than a better straight.

The only hand that beats you is 59 or 9T. Difficult to imagine a villain that tight calling your preflop raise with either of those.

Re: Straight, but oh no!
 

I think the most plausible result would be a split pot. But if he floped the nuts he might make a play like this, thinking: "hmmm, i floped the nuts so i'll check that A on the turn like i'm scared of it".
i wouldn't fold this hand tho.

Re: Straight, but oh no!
 

Yeah, can't fold here. Villain's line looks like it could be a club draw to me. I think him raising the flop and checking behind turn make a set and the nut straight less likely.

Re: Straight, but oh no!
 

Strange line. But why do you call the flop? You have a one card idiot end straightdraw on 2 flush board. And you are raised. B/f flop IMO.

Re: Straight, but oh no!
 

Oh I called the flop because I had seen him make moves, and I figured I had 10 outs.

Re: Straight, but oh no!
 

If you've seen him make moves you should include that as one of your reads in the OP in addition to villain's stats. After only 26 hands you've seen him make multiple moves? This leans me even closer to busted club draw.

Re: Straight, but oh no!
 

[ QUOTE ]
If you've seen him make moves you should include that as one of your reads in the OP in addition to villain's stats. After only 26 hands you've seen him make multiples moves? This leans me even closer to busted club draw.

[/ QUOTE ]

Just twice, not big moves, but the sort of thing where when a flop comes low and gets c-bet, he doesn't buy it (he assumes, usually correctly, that you're on A/KJ+, or 22-77. So his 3-bet beats most preflop raising ranges on a board like that, so I nearly expect the raise.

Re: Straight, but oh no!
 

Results? I'm assuming you didn't fold.

Re: Straight, but oh no!
 

Raise all in.

He doesnt think you have a 5, your river bet looks uber weak, there are only 4 combinations of hands (T9s) youre worried about, and with his agression he is trying to move you off of a 2 pair type hand.